package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.GlobalExceptionHandler.CustomException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.redis.RedisConstant;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private RedisTemplate redisTemplate;

    @Autowired
    private SystemUserMapper systemUserMapper;



    @Override
    public SystemUserInfoVo getUserinfo(Long userId) {
        SystemUser systemUser = systemUserMapper.selectById(userId);
        SystemUserInfoVo systemUserInfoVo = new SystemUserInfoVo();
        systemUserInfoVo.setName(systemUser.getName());
        systemUserInfoVo.setAvatarUrl(systemUser.getAvatarUrl());
        return systemUserInfoVo;
    }

    @Override
    public String login(LoginVo loginVo) {
        //判断是否输入了验证码
        if (!StringUtils.hasText(loginVo.getCaptchaCode())) {
            throw new CustomException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }

        //判断在redis的key是否存在(过期)
        String code = (String)redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if (code == null) {
            throw new CustomException(ResultCodeEnum.APP_LOGIN_CODE_EMPTY);
        }
        //判断在redis的key是否和用户输入的验证码匹配
        if (!code.equals(loginVo.getCaptchaCode().toLowerCase())) {
            throw new CustomException(ResultCodeEnum.APP_LOGIN_CODE_ERROR);
        }

        //判断用户是否存在
        LambdaQueryWrapper<SystemUser> QueryWrapper = new LambdaQueryWrapper<>();
        QueryWrapper.eq(SystemUser::getUsername, loginVo.getUsername());
        SystemUser systemUser = systemUserMapper.selectOne(QueryWrapper);
        if (systemUser == null) {
            throw new CustomException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        //用户是否被禁?
        if (systemUser.getStatus() == BaseStatus.DISABLE) {
            throw new CustomException(ResultCodeEnum.APP_ACCOUNT_DISABLED_ERROR);
        }

        //判断用户密码
        if (!systemUser.getPassword().equals(DigestUtils.md5DigestAsHex(loginVo.getPassword().getBytes()))) {
            throw new CustomException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        //返回token
        return JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());

    }

    @Override
    public CaptchaVo getCaptcha() {
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);

        String lowerCase = specCaptcha.text().toLowerCase();  // 转验证码为小写
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID();
        String image = specCaptcha.toBase64();

        redisTemplate.opsForValue().set(key,lowerCase,RedisConstant.APP_LOGIN_CODE_TTL_SEC, TimeUnit.SECONDS);

        return new CaptchaVo(image, key);
    }
}
